English verb conjugation COULD RUB

Regular verb: rub - rubbed - rubbed

Affirmation

Simple form

I could rub
you could rub
she could rub
we could rub
you could rub
they could rub

V-ing form

I could be rubbing
you could be rubbing
she could be rubbing
we could be rubbing
you could be rubbing
they could be rubbing

Perfect

I could have rubbed
you could have rubbed
she could have rubbed
we could have rubbed
you could have rubbed
they could have rubbed

V-ing perfect

I could have been rubbing
you could have been rubbing
she could have been rubbing
we could have been rubbing
you could have been rubbing
they could have been rubbing

Negation

Simple form

I couldn't rub
you couldn't rub
she couldn't rub
we couldn't rub
you couldn't rub
they couldn't rub

V-ing form

I couldn't be rubbing
you couldn't be rubbing
she couldn't be rubbing
we couldn't be rubbing
you couldn't be rubbing
they couldn't be rubbing

Perfect

I couldn't have rubbed
you couldn't have rubbed
she couldn't have rubbed
we couldn't have rubbed
you couldn't have rubbed
they couldn't have rubbed

V-ing perfect

I couldn't have been rubbing
you couldn't have been rubbing
she couldn't have been rubbing
we couldn't have been rubbing
you couldn't have been rubbing
they couldn't have been rubbing

Interrogative form

Simple form

could I rub?
could you rub?
could she rub?
could we rub?
could you rub?
could they rub?

V-ing form

could I be rubbing?
could you be rubbing?
could she be rubbing?
could we be rubbing?
could you be rubbing?
could they be rubbing?

Perfect

could I have rubbed?
could you have rubbed?
could she have rubbed?
could we have rubbed?
could you have rubbed?
could they have rubbed?

V-ing perfect

could I have been rubbing?
could you have been rubbing?
could she have been rubbing?
could we have been rubbing?
could you have been rubbing?
could they have been rubbing?

Interro-negative form

Simple form

couldn't I rub?
couldn't you rub?
couldn't she rub?
couldn't we rub?
couldn't you rub?
couldn't they rub?

V-ing form

couldn't I be rubbing?
couldn't you be rubbing?
couldn't she be rubbing?
couldn't we be rubbing?
couldn't you be rubbing?
couldn't they be rubbing?

Perfect

couldn't I have rubbed?
couldn't you have rubbed?
couldn't she have rubbed?
couldn't we have rubbed?
couldn't you have rubbed?
couldn't they have rubbed?

V-ing perfect

couldn't I have been rubbing?
couldn't you have been rubbing?
couldn't she have been rubbing?
couldn't we have been rubbing?
couldn't you have been rubbing?
couldn't they have been rubbing?

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